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Finding the Fourth Proportional to 978,007.20, 1,349,714.68 and 548,315.16

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Solution

The fourth proportional to 978,007.20, 1,349,714.68 and 548,315.16 is: 756,711.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,007.20 : 1,349,714.68 = 548,315.16 : x
  2. Step 2: Convert to fraction form
    978,007.20/1,349,714.68 = 548,315.16/x
  3. Step 3: Cross multiply
    978,007.20x = 1,349,714.68 × 548,315.16
  4. Step 4: Simplify right side
    978,007.20x = 740,069,019,347.76
  5. Step 5: Solve for x
    x = 740,069,019,347.76/978,007.20
  6. Step 6: Final answer
    x = 756,711.22

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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.