Home / 647,314,870.80-971,868,101.40-511,154,000.40

Finding the Fourth Proportional to 647,314,870.80, 971,868,101.40 and 511,154,000.40

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Solution

The fourth proportional to 647,314,870.80, 971,868,101.40 and 511,154,000.40 is: 767,438,367.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,314,870.80 : 971,868,101.40 = 511,154,000.40 : x
  2. Step 2: Convert to fraction form
    647,314,870.80/971,868,101.40 = 511,154,000.40/x
  3. Step 3: Cross multiply
    647,314,870.80x = 971,868,101.40 × 511,154,000.40
  4. Step 4: Simplify right side
    647,314,870.80x = 496,774,267,891,762,816
  5. Step 5: Solve for x
    x = 496,774,267,891,762,816/647,314,870.80
  6. Step 6: Final answer
    x = 767,438,367.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.