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Finding the Fourth Proportional to 478,526.40, 717,886.80 and 163,015.20

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Solution

The fourth proportional to 478,526.40, 717,886.80 and 163,015.20 is: 244,555.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,526.40 : 717,886.80 = 163,015.20 : x
  2. Step 2: Convert to fraction form
    478,526.40/717,886.80 = 163,015.20/x
  3. Step 3: Cross multiply
    478,526.40x = 717,886.80 × 163,015.20
  4. Step 4: Simplify right side
    478,526.40x = 117,026,460,279.36
  5. Step 5: Solve for x
    x = 117,026,460,279.36/478,526.40
  6. Step 6: Final answer
    x = 244,555.91

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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.