Home / 687,643.80-1,031,465.70-435,701.40

Finding the Fourth Proportional to 687,643.80, 1,031,465.70 and 435,701.40

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Solution

The fourth proportional to 687,643.80, 1,031,465.70 and 435,701.40 is: 653,552.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,643.80 : 1,031,465.70 = 435,701.40 : x
  2. Step 2: Convert to fraction form
    687,643.80/1,031,465.70 = 435,701.40/x
  3. Step 3: Cross multiply
    687,643.80x = 1,031,465.70 × 435,701.40
  4. Step 4: Simplify right side
    687,643.80x = 449,411,049,541.98
  5. Step 5: Solve for x
    x = 449,411,049,541.98/687,643.80
  6. Step 6: Final answer
    x = 653,552.10

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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.