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Finding the Fourth Proportional to 1,319,931.02, 1,979,903.82 and 478,460.90

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Solution

The fourth proportional to 1,319,931.02, 1,979,903.82 and 478,460.90 is: 717,693.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,931.02 : 1,979,903.82 = 478,460.90 : x
  2. Step 2: Convert to fraction form
    1,319,931.02/1,979,903.82 = 478,460.90/x
  3. Step 3: Cross multiply
    1,319,931.02x = 1,979,903.82 × 478,460.90
  4. Step 4: Simplify right side
    1,319,931.02x = 947,306,563,630.64
  5. Step 5: Solve for x
    x = 947,306,563,630.64/1,319,931.02
  6. Step 6: Final answer
    x = 717,693.99

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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.