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Finding the Fourth Proportional to 710,066.59, 979,886.91 and 387,776.77

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Solution

The fourth proportional to 710,066.59, 979,886.91 and 387,776.77 is: 535,129.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,066.59 : 979,886.91 = 387,776.77 : x
  2. Step 2: Convert to fraction form
    710,066.59/979,886.91 = 387,776.77/x
  3. Step 3: Cross multiply
    710,066.59x = 979,886.91 × 387,776.77
  4. Step 4: Simplify right side
    710,066.59x = 379,977,380,925.08
  5. Step 5: Solve for x
    x = 379,977,380,925.08/710,066.59
  6. Step 6: Final answer
    x = 535,129.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.