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Finding the Fourth Proportional to 478,779.60, 718,302.24 and 208,931.28

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Solution

The fourth proportional to 478,779.60, 718,302.24 and 208,931.28 is: 313,454.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,779.60 : 718,302.24 = 208,931.28 : x
  2. Step 2: Convert to fraction form
    478,779.60/718,302.24 = 208,931.28/x
  3. Step 3: Cross multiply
    478,779.60x = 718,302.24 × 208,931.28
  4. Step 4: Simplify right side
    478,779.60x = 150,075,806,430.07
  5. Step 5: Solve for x
    x = 150,075,806,430.07/478,779.60
  6. Step 6: Final answer
    x = 313,454.89

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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.