Home / 1,390,675.76-1,919,041.17-778,688.22

Finding the Fourth Proportional to 1,390,675.76, 1,919,041.17 and 778,688.22

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Solution

The fourth proportional to 1,390,675.76, 1,919,041.17 and 778,688.22 is: 1,074,538.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,675.76 : 1,919,041.17 = 778,688.22 : x
  2. Step 2: Convert to fraction form
    1,390,675.76/1,919,041.17 = 778,688.22/x
  3. Step 3: Cross multiply
    1,390,675.76x = 1,919,041.17 × 778,688.22
  4. Step 4: Simplify right side
    1,390,675.76x = 1,494,334,752,774.02
  5. Step 5: Solve for x
    x = 1,494,334,752,774.02/1,390,675.76
  6. Step 6: Final answer
    x = 1,074,538.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.