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Finding the Fourth Proportional to 438,840.78, 657,722.55 and 249,459.78

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Solution

The fourth proportional to 438,840.78, 657,722.55 and 249,459.78 is: 373,883.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,840.78 : 657,722.55 = 249,459.78 : x
  2. Step 2: Convert to fraction form
    438,840.78/657,722.55 = 249,459.78/x
  3. Step 3: Cross multiply
    438,840.78x = 657,722.55 × 249,459.78
  4. Step 4: Simplify right side
    438,840.78x = 164,075,322,624.04
  5. Step 5: Solve for x
    x = 164,075,322,624.04/438,840.78
  6. Step 6: Final answer
    x = 373,883.49

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1.5x scale

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.