Home / 290,330,666.40-435,495,999.60-128,772,602.40

Finding the Fourth Proportional to 290,330,666.40, 435,495,999.60 and 128,772,602.40

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Solution

The fourth proportional to 290,330,666.40, 435,495,999.60 and 128,772,602.40 is: 193,158,903.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,330,666.40 : 435,495,999.60 = 128,772,602.40 : x
  2. Step 2: Convert to fraction form
    290,330,666.40/435,495,999.60 = 128,772,602.40/x
  3. Step 3: Cross multiply
    290,330,666.40x = 435,495,999.60 × 128,772,602.40
  4. Step 4: Simplify right side
    290,330,666.40x = 56,079,953,203,281,368
  5. Step 5: Solve for x
    x = 56,079,953,203,281,368/290,330,666.40
  6. Step 6: Final answer
    x = 193,158,903.60

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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.