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Finding the Fourth Proportional to 478,617.30, 717,925.95 and 163,430.10

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Solution

The fourth proportional to 478,617.30, 717,925.95 and 163,430.10 is: 245,145.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,617.30 : 717,925.95 = 163,430.10 : x
  2. Step 2: Convert to fraction form
    478,617.30/717,925.95 = 163,430.10/x
  3. Step 3: Cross multiply
    478,617.30x = 717,925.95 × 163,430.10
  4. Step 4: Simplify right side
    478,617.30x = 117,330,709,801.10
  5. Step 5: Solve for x
    x = 117,330,709,801.10/478,617.30
  6. Step 6: Final answer
    x = 245,145.15

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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.