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Finding the Fourth Proportional to 472,402,436.80, 708,603,655.20 and 407,779,211.20

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Solution

The fourth proportional to 472,402,436.80, 708,603,655.20 and 407,779,211.20 is: 611,668,816.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,402,436.80 : 708,603,655.20 = 407,779,211.20 : x
  2. Step 2: Convert to fraction form
    472,402,436.80/708,603,655.20 = 407,779,211.20/x
  3. Step 3: Cross multiply
    472,402,436.80x = 708,603,655.20 × 407,779,211.20
  4. Step 4: Simplify right side
    472,402,436.80x = 288,953,839,570,892,800
  5. Step 5: Solve for x
    x = 288,953,839,570,892,800/472,402,436.80
  6. Step 6: Final answer
    x = 611,668,816.80

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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.